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Laplandite-(Ce)

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About Laplandite-(Ce)Hide

Formula:
Na4CeTiPO4Si7O18 · 5H2O
Colour:
gray-white, pale yellow, pale blue
Lustre:
Vitreous, Greasy
Hardness:
2 - 3
Specific Gravity:
2.83
Crystal System:
Orthorhombic
Name:
For Lappland (Lapland), the region in which the Kola Peninsula lies.
This page provides mineralogical data about Laplandite-(Ce).


Classification of Laplandite-(Ce)Hide

Approved
9.DJ.10

9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
78.7.9.1

78 : Unclassified Silicates
7 :
17.6.10

17 : Silicates Containing other Anions
6 : Silicates with phosphate

Physical Properties of Laplandite-(Ce)Hide

Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
gray-white, pale yellow, pale blue
Hardness:
2 - 3 on Mohs scale
Fracture:
Splintery
Density:
2.83 g/cm3 (Measured)    2.71 g/cm3 (Calculated)

Optical Data of Laplandite-(Ce)Hide

Type:
Biaxial (-)
RI values:
nα = 1.568 nβ = 1.584 nγ = 1.585
2V:
Measured: 28° , Calculated: 26°
Max Birefringence:
δ = 0.017
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong

Chemical Properties of Laplandite-(Ce)Hide

Formula:
Na4CeTiPO4Si7O18 · 5H2O
IMA Formula:
Na4CeTiPSi7O22 · 5H2O

Crystallography of Laplandite-(Ce)Hide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmmm
Setting:
Pmmm
Cell Parameters:
a = 7.27 Å, b = 14.38 Å, c = 22.25 Å
Ratio:
a:b:c = 0.506 : 1 : 1.547
Unit Cell V:
2,326.07 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Radial-fibrous aggregates.

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of Laplandite-(Ce)Hide

General Appearance of Type Material:
radiating-fibrous deposits up to 0.5-1 cm and
fan-shaped platy aggregates; the plates about 0.01 mm thick are flattened on the c axis
Place of Conservation of Type Material:
Institute of Mineralogy and Geochemistry of Rare Elements, Moscow; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 75512, 76312.
Geological Setting of Type Material:
natrolite zone of a pegmatite in a differentiated alkalic massif.
Associated Minerals at Type Locality:
Reference:
Es’kova E M, Semenov E I, Khomyakov A P, Kazakova M E, Sidorenko O V (1974) Laplandite, a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 103, issue 5, 571-575

Synonyms of Laplandite-(Ce)Hide

Other Language Names for Laplandite-(Ce)Hide

Simplified Chinese:硅钛铈钠石

Related Minerals - Nickel-Strunz GroupingHide

9.DJ.05NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2Tet.
9.DJ.15Caysichite-(Y)Ca2Y2Si4O10(CO3)3 · 4H2OOrth. mm2
9.DJ.20Seidite-(Ce)Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2OMon.
9.DJ.25Carlosturanite(Mg,Fe,Ti)21(Si,Al)12O28(OH)34•H2OMon.
9.DJ.30JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.6.1NagelschmidtiteCa7(SiO4)2(PO4)2Hex. 6 : P61
17.6.2PerhamiteCa3Al7.7Si3P4O23.5(OH)14.1 · 8H2OTrig. 3m (3 2/m) : P3m1
17.6.3Viséite
17.6.4PhosinaiteNa13Ca2(Ce,La,Th,Nd,Pr)(Si4O12)(PO4)4
17.6.5ClinophosinaiteNa12(Ca,Sr)4(Si4O12)(PO4)4Mon.
17.6.6Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2OAmor.
17.6.7LomonosoviteNa5Ti2(Si2O7)(PO4)O2Tric.
17.6.8BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F Tric. 1 : P1
17.6.9SoboleviteNa13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3Mon. m : Pb
17.6.11 VunonnemiteNa5TiNb3Si6O25F2 · 2Na3PO4
17.6.12Saryarkite-(Y)Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2OTet. 4 2 2
17.6.13Steenstrupine-(Ce)Na14Mn2+2(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2 · 2H2OTrig.
17.6.14WaylanditeBiAl3(PO4)2(OH)6Trig. 3m (3 2/m) : R3m
17.6.15Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
17.6.16Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
17.6.17EylettersiteTh0.75Al3(PO4)2(OH)6Trig.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Laplandite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Es’kova E M, Semenov E I, Khomyakov A P, Kazakova M E, Sidorenko O V (1974) Laplandite, a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 103, issue 5, 571-575
Fleischer M, Chao G Y, Kato A (1975) New mineral names. American Mineralogist 60:487

Internet Links for Laplandite-(Ce)Hide

Localities for Laplandite-(Ce)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China
 
  • Inner Mongolia
    • Hohhot City (Huhehaote Prefecture)
      • Wuchuan County
Fengjun Nie, Fengxiang Wang, Yu'an Zhao, Yan Sun, and Hua Chai (2013): Mineral Deposits 32(4), 730-743
Russia (TL)
 
  • Murmansk Oblast
    • Lovozersky District
      • Karnasurt Mountain
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
 
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